Received: 10 December 2020
Accepted: 30 July 2021
First Online: 9 August 2021
: This study was approved by the ethics committee of each participating center and the Chonnam National University Hospital Institutional Review Board ethics committee (CNUH-2011-172) according to the ethical guideline of the Declaration of Helsinki. The written informed consent was obtained from all patients prior to their inclusion in the study.
: Not applicable.
: The authors declare that they have no competing interests.